Update actions/upload-artifact action to v7

Author: renovate[bot]

.github/workflows/pr-checks.yaml

@@ -40,7 +40,7 @@ jobs:
 
       - name: (Fail-only) Upload the build report
         if: failure()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: error-report
           path: build-reports.zip